Solar Radiation Activity Observation

Solar Radiation Storm Forecast for May 25-May 27 2019

Rationale: No S1 (Minor) or greater solar radiation storms are expected.
No significant active region activity favorable for radiation storm
production is forecast.

Radio Blackout Activity

No radio blackouts were observed over the past 24 hours.

Radio Blackout Forecast for May 25-May 27 2019

May 25

May 26

May 27

R1-R2

1%

1%

1%

R3 or greater

1%

1%

1%

Rationale: No R1 (Minor) or greater radio blackouts are expected. No
significant active region flare activity is forecast.

Sun Images

eit 171

eit 195

eit 284

eit 304

Images: From left to right: EIT 171, EIT 195, EIT 284, EIT 304 EIT (Extreme ultraviolet Imaging Telescope)
images the solar atmosphere at several wavelengths, and therefore, shows solar material at different temperatures.
In the images taken at 304 Angstrom the bright material is at 60,000 to 80,000 degrees Kelvin.
In those taken at 171 Angstrom, at 1 million degrees. 195 Angstrom images correspond to about 1.5 million Kelvin, 284 Angstrom to 2 million degrees.
The hotter the temperature, the higher you look in the solar atmosphere.

SDO/HMIContinuum

SDO/HMIMagnetogram

LASCO C2

LASCO C3

The MDI (Michelson Doppler Imager) images shown here are taken in the continuum near the Ni I 6768 Angstrom line.
The most prominent features are the sun spots.

LASCO (Large Angle Spectrometric Coronagraph) is able to take images of the solar corona by blocking the light coming directly from the Sun
with an occulter disk, creating an artificial eclipse within the instrument itself.

Auroral activity

Northern Auroral map

Southern Auroral map

Instruments on board the NOAA Polar-orbiting Operational Environmental Satellite (POES) continually monitor the power flux carried by
the protons and electrons that produce aurora in the atmosphere.
SWPC has developed a technique that uses the power flux observations obtained during a single pass of the satellite over a polar region
(which takes about 25 minutes) to estimate the total power deposited in an entire polar region by these auroral particles.
The power input estimate is converted to an auroral activity index that ranges from 1 to 10.

Introduction Movie

Conditions on the Sun and in the solar wind, magnetosphere, ionosphere and thermosphere that can influence the performance and reliability of space-borne and
ground-based technological systems and can endanger human life or health.
This introduction movie in the English language will open on a new tab/window when you click on the image below.